Liquid dispenser



Nov. 16, 1954 H. F. ToMAsx-:K

LIQUID DISPENSER Filed Dec. 9, 1950 Affi '5.

United States Patent LIQUID DISPENSER Herbert F. Tomasek, Webster Groves, Mo., assignor to Knapp-Monarch Company, St. Louis, Mo., a corporau tion of Delaware Application December 9, 1950, Serial No. 200,014

2 Claims. (Cl. 299-95) This invention relates to a liquid dispenser such as one of the type for dispensing insecticide and the like in aerosol form, the present application being a continuation-in-part of my copending application, Serial No. 708,504, filed November 8, 1946, now abandoned.

One object of the invention is to provide a dispenser comprising a spray head and a container for attachment thereto, the container being provided for a liquid such as insecticide, germicide, deodorant and the like and having therein at the time of purchase a sealed bulb containing CO2 or other gas under high pressure for displacing the liquid from the container through the spraying head to atmosphere when the head is associated with the container and a valve in the head is opened.

Another object is to provide a special throw-away container including a pressure bulb which is also thrown away after the contents of the container are dispensed through a detachable spraying head, the container being connectible and disconnectible in relation to the spraying head as by means of a screw threaded connection, and the spraying head including means to release the compressed gas from the bulb into the container for displacing liquid therefrom when a valve in the head is opened.

With these and other objects in view, my invention consists in the construction, arrangement and combination of the various parts of my device whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims and illustrated in the accompanying drawings, wherein:

Figure 1 is a side elevation of a liquid dispenser embodying my present invention.

Figure 2 is a sectional view through a container showing it capped for sale and a bulb for dispensing the liquid therefrom, and

Figure 3 is an enlarged sectional View through the spraying head and the upper portion of the container showing the container associated with the head and-the pressure bulb pierced for releasing gas therefrom into the container.

On the accompanying drawings I have used the reference numeral to indicate a container of thin sheet metal and 12 an integral or permanent bottom thereof. The container is provided with a threaded neck 14 on which may be screwed a cap 16 as in Figure 2 or a boss 18 of a spraying head H as shown in Figure l.

A positioning washer 22 is mounted within the neck 14 for a pressure bulb B such as one of the compressed gas containing type and is loosely mounted in the neck for rotation. The bulb B may for instance contain CO2. The bottom 12 is provided with a depression 24 to operate in conjunction with the Washer 22 to keep the bulb B in its properly located position with respect to the container 10. The structure shown in Figure 2 is a liquid and high pressure gas container that can be sold as a unit with any desired type of liquid and any desirable gas under pressure therein.

The unit of Figure 2 is to be associated with the spraying head H by removal of the cap 16 whereupon the neck 14 may be screwed into the boss 18 of the heal with the gasket 19 between them. The head is provided with a piercing pin 26 adapted to pierce the upper wall 28 of the bulb B (see Figure 3) as the neck 14 is screwed into the boss 18. The neck of the bulb B rst contacts a sealing sleeve 30 before the piercing pin 26 enters the top wall 28 of the bulb.

2,694,602 Patented Nov. 16., 1954 To prevent the undesirable escape of gas just after the piercing pin 26 enters the top wall 28 of the bulb, I provide an O-ring 19 resting against a shoulder of the head H and engaging against a reduced neck portion of the screwthreaded neck 14. The O-ring also prevents leakage of insecticide or other liquid from within the container 10. The gas through the piercing pin which is hollow flows through a passageway 32 in the head and into the container 10 after the bulb is pierced.

The head has a spray nozzle 36 screwed into its forward end and provided with a minute discharge passageway 38 through which the liquid under pressure flows. Due to its small size, this opening serves to spray the liquid in the form of an aerosol. The rear end of the passageway 38 serves as a valve seat indicated at 40.

The valve seat 40 communicates with a passageway 42 which is connected by a passageway 44 with a syphon tube 46. The positioning washer 22 is slotted through one side as indicated to permit passage of the syphon tube 46 therethrough and the washer rotates with the head H and the syphon tube as the head is screwed on to the container 10. In the passageway 42 a needle valve 48 is provided which is normally retained in the seated position by a spring 50. The needle valve may be unseated by pulling on a trigger 52 adjacent a handle 54 for holding the spraying device.

The open position of the needle valve is shown by dotted lines in Figure 3 together with the corresponding position of the trigger 52 and of a collar 56 secured to the needle valve. The spring 50 is interposed between the collar 56 and a washer 58. The Washer 58 imposes the force of the spring on a packing sleeve 60 to prevent leakage of the liquid rearwardly around the valve stem and into the space in the head H provided for the trigger 52.

From the foregoing specification it will be obvious that I have provided a simple arrangement for spraying liquid under the action of a compressed gas which may be sold as a unit with the liquid and gas in a single container adapted for a simple method of attachment to a spraying head. The container and pressure bulb can be made sufficiently inexpensive to be economically thrown away after use, thus eliminating the bother of refund. The complete spraying device, however, is a high quality instrument as the spraying head, repeatedly usable with additional containers, can be precision made for the most effective spraying action.

Some changes may be made in the construction and arrangement of the parts of my device without departing from the real spirit and purpose of my invention, and it is my intention to cover by my claims any modied forms of structure or use of mechanical equivalents which may be reasonably included within their scope.

I claim as my invention:

l. A spraying device comprising a replaceable and disposable container for liquid and pressurizing gas in combination with a removable and re-usable dispensing head, said container having an integral bottom provided with a recess and having a restricted neck portion at its upper end terminating in an open top, said neck being screw-threaded, a pressurizing gas cylinder wholly within said container and having its bottom end seated in said recess and its top end spacedly positioned within said neck, said dispensing head having a screw-threaded portion for effecting cooperative attachment to the neck of said container, and having sealing means therein cooperating with the top end of said cylinder to etfect sealing engagement therewith when said head is screwed onto said container, said head having a tube depending therefrom into said container and having a valve communicating with said head for controlling tlow of fluid from said container through said head, and piercing means carried by said head in xed relation thereto to open said gas pressurizing cylinder to the interior of said container, said piercing means being operable by the last portion of the screw-threaded attachment of said container to said dispensing head, whereby sealing engagement of said head with said cylinder is effected prior to the operation of said piercing means.

2. A spraying device comprising a replaceable and disposable container for liquid and pressurizing gas in combination with a removable and re-usable dispensing head, said container having an integral bottom provided with a recess and having a restricted neck portion at its upper end terminating in an open top, said neck being screw-threaded, a pressurizing gas cylinder wholly within said container and having its bottom end seated in said recess and its top end spaccdly positioned within said neck by means of an annular spacing member surrounding said pressurizing gas cylinder below said container open top and cooperating with said neck and said cylinder for fxedly positioning said cylinder within said container, said annular member being vfreely rotatable in said container, said dispensing head having a screwthreaded portion for effecting cooperative attachment to the neck of said container, and; having sealingy means therein cooperating with the top endl of said cylinder to effect sealing engagement therewith when said head is screwed onto said container, said head having a tube depending therefrom into said container and. having a valvev communicatingy with said. head forv controlling ow of uid from said containerl through said head, and

piercing means carried by said head in fixed relation thereto to open said gas pressurizing cylinder to the interior of said container, said piercing means being operablc by the last portion of the screw-threaded attachment of said container to said dispensing head, whereby sealing engagement of said head with said cylinder is effected prior to the operation of said piercing means.

References Cited in the tile of this patent UNITED STATES PATENTS Number Name Date 1,905,986 Jacobs et al. Apr. 25, 1933 1,920,165 Andvig Aug. 1, 1933 2,189,643 Ward Feb. 6, 1940 2,412,833 Prager Dec. 17, 1946 2,546,808 Wood et al. Mar. 27, 1951 2,559,091 Reasenberg July 3, 1951 

